气候变化领域集成服务门户(CCPortal): The winter midlatitude-Arctic interaction: effects of North Atlantic SST and high-latitude blocking on Arctic sea ice and Eurasian cooling

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DOI	10.1007/s00382-018-4301-5
	The winter midlatitude-Arctic interaction: effects of North Atlantic SST and high-latitude blocking on Arctic sea ice and Eurasian cooling
	Luo B.; Wu L.; Luo D.; Dai A.; Simmonds I.
发表日期	2019
ISSN	0930-7575
起始页码	2981
结束页码	3004
卷号	52 期号:2020-05-06
英文摘要	In this paper, the effects of Eurasian circulation patterns such as high-latitude European blocking (HEB) and Ural blocking (UB) events on winter sea-ice concentration (SIC) in the Barents–Kara seas (BKS) and Eurasian cooling is examined to differentiate the different roles of HEB and UB in association with positive North Atlantic Oscillation (NAO + ) events. A particular focus is on the SIC variability resulting from the effect of sea surface temperature (SST) near the Gulf Stream Extension (GSE) region through to the position change of Eurasian blocking. It is found that the SST shows a dipole pattern with a positive (negative) anomaly to the south (north) of the GSE, while the high SST in BKS plays a major role in the BKS SIC decline. The strengthening of North Atlantic westerly winds associated with the SST dipole tends to promote long-lived UB and HEB events associated with NAO + to further reduce the BKS SIC, while HEB and UB depend on the prior BKS warming and UB requires stronger North Atlantic westerly winds than HEB. During UB, warm moist air from the GSE can reach the BKS to enhance downward infrared radiation (IR) via increased northward transport produced by the NAO + -UB relay. The downward IR is weak during HEB as the moisture is transported mainly into the western part of BKS, even though the NAO + -HEB relay still operates. Thus, UB leads to more pronounced BKS sea-ice declines than under HEB, although the latter still significantly contributes to the SIC loss. It is also found that the central-eastern Asian cooling occurring during UB is related to an intense, widespread SIC decline in BKS prior to the UB onset, whereas the European cooling during HEB is linked to a small SIC decline in the western part of BKS. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	air-sea interaction; atmospheric blocking; cooling; North Atlantic Oscillation; sea ice; sea surface temperature; winter; Arctic Ocean; Barents Sea; Eurasia; Kara Sea
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146484
作者单位	Physical Oceanography Laboratory/CIMST, College of Atmospheric and Ocean Sciences, Ocean University of China, Qingdao, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States; School of Earth Sciences, University of Melbourne, Melbourne, VIC, Australia
推荐引用方式 GB/T 7714	Luo B.,Wu L.,Luo D.,et al. The winter midlatitude-Arctic interaction: effects of North Atlantic SST and high-latitude blocking on Arctic sea ice and Eurasian cooling[J],2019,52(2020-05-06).
APA	Luo B.,Wu L.,Luo D.,Dai A.,&Simmonds I..(2019).The winter midlatitude-Arctic interaction: effects of North Atlantic SST and high-latitude blocking on Arctic sea ice and Eurasian cooling.Climate Dynamics,52(2020-05-06).
MLA	Luo B.,et al."The winter midlatitude-Arctic interaction: effects of North Atlantic SST and high-latitude blocking on Arctic sea ice and Eurasian cooling".Climate Dynamics 52.2020-05-06(2019).